For road traffic noise monitoring, a microphone is positioned at a given point next to a highway or major road, and a sound level meter is used to record level fluctuations as well as actual sound at the site. With a constant monitoring system, interval measurement is also possible. Noise events are detected automatically and evaluated to determined whether they are aircraft noise.

Measurement of environmental vibrations such as from building sites, industrial plants, traffic etc. are performed with a vibration level meter. (according to the Japan Measurement Act JIS C 1510: 1995)

This is a volume meter allowing high-accuracy measurements in air, regardless of the shape of the measurement target object.